Jack for relieving pressure on pneumatic tires of motor-vehicles.



PATENTEVD NOV. 28, 1905.

. J; 0. WANDSJ 'JAGK FOR RELIEVING PRESSURE 0N PNEUMATIC TIRES 0P MOTOR VEHICLES APPLICATION FILED MAY 18,1905

tnessek:

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JOHN C. wanes, or s'r. LOUIS, MISSOURI. .ucr FGR Ruin/me PRESSURE 0M Paula/me nets OF MOTOR-VEHiCLES.

' Specificationof Letters-Patent. Application filed May 18, 1905. Serial No. 260,995.

Pater-manna 28,1905,

To all whom it may concern:

. Be it known thati, JOHN C. WANDS, a citizen of the United States,rcsiding at St. LouisflMissouri, have invented a certain new and useful Improvement in Jacks for Relieving Pressure on Pneumatic Tires of Motor -Vehieles, of Which the following is a full, clear, and exact description,such as will enable others skilled in the art to which-it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specifi cation, in which Figure 1 is a rear view of a motor-vehicle,

showing my invention applied. Fig. 2. is a sectional view through a'jaclr constructed in accordance with my invention. Fig. 3 is a perspective view of the huh-engaging jaw.

Fig. i is a cross-sectional view onthe line is of Fig. 2, and Fig. 5 is a top plan view of the with pneumatic tires and as these tires are li abl e to set at the tread portions, on which they rest when not in use, the liability of deterioration of the tire on account oi the weight of. the ve-' hiole is a material factor in the life thereof. it is recognized in this art that the wear on the tire due to this so called setting is nearly, if not wholly, as great as the wear and tear caused by the travel of the tire over the road. It'is contemplated to reduce theliability of the wear of the tire by maintaining it above its support. I accomplish this through the medium of a novel form of jack illus trated in Figs. 2to 501 the drawings, in which 1 designates a base having a bottom flange 1 eccentric to an upstanding standard portion 2. One side of the base-flange 1 is straight, as at 3, so that the base may be introduced close to the wheel. The portion 2 is provided with an internal thread, as at l, to receive a threaded shank 5 on a rotatable operating.

member 6, which operating member is provided with a plurality of curved handholds 7, comprising an approximately spherical portion, at the top of which isa shoulder 8, having a raceway 9 for the reception of antifriction devices 10, which antifriction devices also engage araceway 1 1 in the sleeved portion 12 of the arcuate hub enga'gin'gjaw 13. This jaw is heldin positionby means, of a constricted portion 14 on the: operating member 6, which constricted portion is in the 3 sleeve 12 and is provided at its end with a flared portion or enlargement 15, workingin a cor-- responding recess in the sleeve, so that said jaw may not become accidentally displaced.

The jaw 13 is preferably faced with some suitable'softmaterial, (indicated'at 16,) so asnot.

to mar the paint or enamel on the hub of the wheel. As most motor-vehicle wheels are provided with outwardly projecting elongated hubs, as'at 17, the jaw may be caused to engage the outer portion of the h ub of each back wheel, and the jack may be moved close to the wheel on account of the peculiar shapeof the base-flange, as heretofore described. Ordinarily four jacks will be utilized for' each motor-vehicle, and each jack will be moved close to the wheel. By turning the operating device 6 through the medium of the handholds 7, through which a suitable bar may be inserted, if desired, the rear. of the wheel may be jacked up a sufficient distance to relieve all pressure on the tires. When it is desired to use the motor-vehicle, the operating device may be turned, so as to permit the tires to rest uponthe floor or ground, so that the jacks may be removed.

One of the particularly novel features of this invention resides in the fact that it may be applied to the outside of the wheel without interfering with. any of the mechanism and in such a manner that it will be readily accessible for application and removal. view of the fact that the jaw is rotatable it will be apparent that said jaw will readily conform to the hub for the desired purposef Having thus described the inventiom what is claimed as new, and desired to besecured byLetters Patent, is-

e 1. The combination with a lifting-jack base having aii'ange provided with. a straight side and a curved portion, of an, upstanding tubular threaded portion integral therewith, a threaded shank in the threaded tubular portion, outwardly curved ha ridholds carried by the shank, integral shouldered jaw-engaging portions above the handholds, and an arcuate."

IIO,

Ian portion carried by threads, an arcuate jaw for engaging the 1m J of the vehicie and an operating device for said jaw comprising 9. shank engaging the. threaded pqrtien on the base, handhoids 7 carried by the shank, and constricted pertion engaging a recs-ss in the jaw; substmsiziailyas described the Tome and having n testimony Wnez'wf I hereunto ufiix my i mm min i he n'escuceof two WitnesSes, this 10 i lat-i1 (122.3 of May 190-7.

JOHN G. WAN 1.):3. 

